What is Hollow-to-Hem?
The best way to understand "hollow-to-hem" (HTH) is to think of it as a guide to how long the dress will be when you put it on your body.
It's really very simple. Hollow-to-hem is the length from the hollow at the base of the front of your neck (the depression or indentation between your collarbones) to the bottom edge of the dress, also called the hem.
Understanding the hollow-to-hem of your dress is an important part of finding the right fit. It helps you estimate where the hem will fall on your body, whether alterations may be needed, and how to plan the rest of your look from shoes to accessories.